<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
    body{
        font-size: 0;
    }
.box{
    display: inline-block;
height: 100px;
width: 100px;
margin-right: 30px;
background-color: red;
}
.content{
display: inline-block;
margin-left: 30px;
background-color: green;
height:100px;
width: 100px;
}


</style>
<body>
    <div class="box"></div>
<div class="content"></div>
</body>
</html>